Past efforts to uproot the militant group have failed. Obama must try a different tack and focus on Israel and Lebanon.
As anniversary of Hezbollah commander Mughniyah's assassination looms, Israel tightens security.
Lebanon's new government is slated to review the militant Shiite party's weapons as part of a national defense strategy once it takes office. The prisoner swap with Israel has given Hezbollah new leverage.
Critics say the deal, which they see as lopsided, could embolden Hezbollah.
In Lebanon, hundreds waited for five prisoners, who were treated as returning heroes.
Claimed by Lebanon and occupied by Israel, it will get new attention as the two countries' last remaining major dispute if a Hezbollah-Israeli prisoner swap is successful.